Wheel animals - Kellicottia
Kellicottia is common in plankton net from freshwater. The mouth -part in the front have the corona of cilia beating to make a water flow into the mouth. The body has a house with three out-growths in front and one outgrowth in the back part.
Video 1 shows the wheel animal surrounded by green algae.
Video 2 shows movement of Kellicottia.